This is a great story about the Oblivion mod he worked on: https://www.eurogamer.net/the-story-behind-the-oblivion-mod-...

In his Usenet days he was also active on the newsgroups about the game Thief, he played that a lot.

You can see the gaming influence in several of the books. In particular, a big part of Snuff was inspired by the goblin caves in Oblivion (IIRC had had a mod created that made the goblins peaceful, and he also contributed to the Vilja companion mod), and you can see his love of the Thief games in various parts of Night Watch and Making Money.

His daughter is (or at least was) a game designer.